I had blood tests at the end of May 2016 which indicated I had diabetes but GFR, BUN, Creatinine were all within normal. I had followup blood work January 2017 which showed my diabetes numbers went down to normal range, however GFR, BUN Creatinine all were drastically down (GFR from 78 to 4) and others up. I am frightened and do not know what my next step should be. I am very limited financially.

I suggest that you discuss your concerns with your primary care physician (PCP) and see if referral may be needed.